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Optimal perturbation for two-dimensional vortex systems: route to non-axisymmetric state

Autor: Véronique Brion, H. G. Johnson, Laurent Jacquin, Navrose, Jean-Christophe Robinet

Publikováno v: Journal of Fluid Mechanics
Journal of Fluid Mechanics, Cambridge University Press (CUP), 2018, 855, pp.922-952. ⟨10.1017/jfm.2018.689⟩

We investigate perturbations that maximize the gain of disturbance energy in a two-dimensional isolated vortex and a counter-rotating vortex pair. The optimization is carried out using the method of Lagrange multipliers. For low initial energy of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59e38b7420ceb03464eb12987383bf27
https://hdl.handle.net/10985/14216

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WHERE THE WORLD IS GOING

Autor: H. G. Johnson

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::33354572b83dbbaf96487a7b27496346
https://doi.org/10.2307/j.ctt1w0ddh2.13

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'Does the past have useful economics?'

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::32fcaa81a93d4d6c032a500820b5dffd
https://doi.org/10.1017/cbo9781139174244.004

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Methodologies for assessing performance of irrigation and drainage management

Autor: H. G. Johnson, W. B. Snellen, D. J. Merrey, D. H. Murray-Rust, Marinus G. Bos

Publikováno v: Irrigation and Drainage Systems. 7:231-261

This paper presents a framework irrigation managers can use in assessing performance of irrigation, and recommends a specific set of indicators for measuring performance that the authors believe are practical, useful, and generally applicable. Althou

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ebdc6b746e14340169d4748ce0f1aca4
https://doi.org/10.1007/bf00881553

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Universal properties of linear magnetoresistance in strongly disordered MnAs-GaAs composite semiconductors

Autor: Steven Bennett, H. G. Johnson, Radhika Barua, Don Heiman, Laura H. Lewis

Publikováno v: Physical Review B. 82

Linear magnetoresistance occurs in semiconductors as a consequence of strong electrical disorder and is characterized by nonsaturating magnetoresistance that is proportional to the applied magnetic field. By investigating a disordered MnAs-GaAs compo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e5d87df9dc0da49abee4fdb621057d0
https://doi.org/10.1103/physrevb.82.085202

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Studies of the impact ofEuseius species (Acari: Phytoseiidae) on citrus mites using predator exclusion and predator release experiments

Autor: H. G. Johnson, James A. McMurtry, Joseph G. Morse

Publikováno v: Experimental & Applied Acarology. 15:233-248

To create plots with differential levels ofEuseius, malathion sprays, highly toxic to phytoseiids but of low toxicity to citrus red mite,Panonychus citri (CRM), and citrus thrips,Scirtothrips citri, were applied to blocks of “Valencia” oranges fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65310c4d290ca74a1b11a45d0b84c293
https://doi.org/10.1007/bf01246565

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Biochemical and Functional Differences Between Eosinophils From Animal Species and Man

Autor: B K Stout, H G Johnson, N J Crittenden, Frank F. Sun, Bruce M. Taylor, C I Czuk

Publikováno v: Journal of Leukocyte Biology. 50:140-150

Eosinophils were isolated from peritoneal lavages of repeated horse serum-injected guinea pigs or rhesus monkeys and from peripheral blood of normal human donors. Eicosanoid metabolism and chemotaxis by these cells were studied by in vitro techniques

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a5f2746db6633a3294b738e545848db
https://doi.org/10.1002/jlb.50.2.140

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Comparative life-history studies on the predaceous mitesTyphlodromus annectens andT. porresi (Acari: Mesostigmata: Phytoseiidae)

Autor: M. H. Badii, J. A. McMurtry, H. G. Johnson

Publikováno v: Experimental & Applied Acarology. 10:129-136

Some aspects of the biologies ofTyphlodromus annectens De Leon andT. porresi McMurtry were studied at 25°C. The tetranychid mitesOligonychus punicae (Hirst),Panonychus citri (McGregor) andTetranychus pacificus McGregor were all favorable foods for d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::635ad78f3cc0b1b90897604cfc630fde
https://doi.org/10.1007/bf01194088

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Response to 'Comment on ‘Determining magnetic nanoparticle size distributions from thermomagnetic measurements’ ' [Appl. Phys. Lett. 98, 216102 (2011)]

Autor: H. G. Johnson, Thomas Nummy, Don Heiman, Steven Bennett, Robert S. DiPietro, Laura H. Lewis

Publikováno v: Applied Physics Letters. 98:216103

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::923dac262130f733441ec8e07fbfd9f6
https://doi.org/10.1063/1.3593498

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Determining magnetic nanoparticle size distributions from thermomagnetic measurements

Autor: Robert S. DiPietro, Steven Bennett, H. G. Johnson, Laura H. Lewis, Don Heiman, Thomas Nummy

Publikováno v: Applied Physics Letters. 96:222506

Thermomagnetic measurements are used to obtain the size distribution and anisotropy of magnetic nanoparticles. An analytical transformation method is described which utilizes temperature-dependent zero-field cooling (ZFC) magnetization data to provid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95cca6bfbe7cfd695903ca87f4c682c0
https://doi.org/10.1063/1.3441411

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